INSTALLATION
Temperature/Pressure Gauge
3/4" Gate or Ball Valve*
Water Inlet from primary water heater
Blended Phosphate Water
Treatment System†
Pressure Reducing Valve with Bypass 20 psi (138 kPa) flow pressure maximum
Inlet
3/4" Union*
3/4" Union*
Temperature/Pressure Pressure Relief Valve 150 psi (1034 kPa)/210°F (99°C)
Discharge from T/P Relief Valve. Air gap must comply with plumbing code.
Temperature/Pressure Gauge
Shock Absorber for water hammer †
Outlet
Outlet to
Dishwasher
3/4" Union*
| NOTE: Centerline of booster “T” fitting must not | Drain Valve* | |
† optional accessory | extend closer than 4" (102 mm) to the floor. | ||
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Floor Drain
*not supplied with booster heater
Figure 8. Plumbing Connections - Imperial “S” Series
Temperature/Pressure Gauge
Pressure Reducing Valve with Bypass 20 psi (138 kPa) flow pressure maximum
|
| Temperature/Pressure | |
Temperature/Pressure Relief Valve | Discharge from T/P Relief Valve. Air gap | Pressure Relief Valve | |
must comply with plumbing code. | 150 psi (1034 kPa)/210°F (99°C) | ||
150 psi (1034 kPa)/210°F (99°C) | |||
|
|
3/4" Gate or |
|
Ball Valve* | 3/4" Union* |
|
Water Inlet from primary water heater
Blended Phosphate Water 
Treatment System†
NOTE: Centerline of booster “T” fitting must not extend closer than 4" (102 mm) to the floor.
† optional accessory
|
| Temperature/Pressure |
| T/P Gauge | Gauge |
| 3/4" Union* | Shock Absorber for |
Outlet | Outlet | water hammer † |
| ||
Inlet | Inlet |
|
|
| |
|
| Outlet to |
|
| Dishwasher |
Drain Valve* | Drain Valve* | 3/4" Union* |
Floor Drain
3/4" Union*
*not supplied with booster heater
Figure 9. Plumbing Connections - Two Imperial Models Connected in Series
Temperature/Pressure Gauge
| Pressure Reducing Valve with Bypass 20 psi |
3/4" Gate or | (138 kPa) flow pressure maximum |
Ball Valve* |
|
Water Inlet from primary water heater
Blended Phosphate Water | 3/4" Union* |
Treatment System† |
|
| Discharge from T/P Relief Valve. Air gap |
† optional accessory | must comply with plumbing code. |
Temperature/Pressure Relief Valve 150 psi (1034 kPa)/210°F (99°C)
Outlet
Inlet
Floor Drain
Temperature/Pressure Gauge
Outlet to
Dishwasher
3/4" Union*
Shock Absorber for water hammer †
Drain Valve*
*not supplied with booster heater
Figure 10. Plumbing Connections - Compact Series 4-18 kW
Form No. | 22 |